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lvm2/tools/vgreduce.c

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/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
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*
* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
#include "tools.h"
static int _remove_pv(struct volume_group *vg, struct pv_list *pvl, int silent)
{
char uuid[64] __attribute__((aligned(8)));
if (vg->pv_count == 1) {
log_error("Volume Groups must always contain at least one PV");
return 0;
}
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if (!id_write_format(&pvl->pv->id, uuid, sizeof(uuid)))
return_0;
log_verbose("Removing PV with UUID %s from VG %s", uuid, vg->name);
if (pvl->pv->pe_alloc_count) {
if (!silent)
log_error("LVs still present on PV with UUID %s: "
"Can't remove from VG %s", uuid, vg->name);
return 0;
}
vg->free_count -= pvl->pv->pe_count;
vg->extent_count -= pvl->pv->pe_count;
del_pvl_from_vgs(vg, pvl);
free_pv_fid(pvl->pv);
return 1;
}
static int _consolidate_vg(struct cmd_context *cmd, struct volume_group *vg)
{
struct pv_list *pvl;
struct lv_list *lvl;
int r = 1;
dm_list_iterate_items(lvl, &vg->lvs)
if (lvl->lv->status & PARTIAL_LV) {
log_warn("WARNING: Partial LV %s needs to be repaired "
"or removed. ", lvl->lv->name);
r = 0;
}
if (!r) {
cmd->handles_missing_pvs = 1;
log_error("There are still partial LVs in VG %s.", vg->name);
log_error("To remove them unconditionally use: vgreduce --removemissing --force.");
log_warn("Proceeding to remove empty missing PVs.");
}
dm_list_iterate_items(pvl, &vg->pvs) {
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if (pvl->pv->dev && !is_missing_pv(pvl->pv))
continue;
if (r && !_remove_pv(vg, pvl, 0))
return_0;
}
return r;
}
static int _make_vg_consistent(struct cmd_context *cmd, struct volume_group *vg)
{
struct lv_list *lvl;
struct logical_volume *lv;
cmd->partial_activation = 1;
restart:
vg_mark_partial_lvs(vg, 1);
dm_list_iterate_items(lvl, &vg->lvs) {
lv = lvl->lv;
/* Are any segments of this LV on missing PVs? */
if (lv->status & PARTIAL_LV) {
if (seg_is_raid(first_seg(lv))) {
if (!lv_raid_remove_missing(lv))
return_0;
goto restart;
}
if (lv_is_mirror(lv)) {
if (!mirror_remove_missing(cmd, lv, 1))
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return_0;
goto restart;
}
if (arg_count(cmd, mirrorsonly_ARG) && !lv_is_mirrored(lv)) {
log_error("Non-mirror-image LV %s found: can't remove.", lv->name);
continue;
}
if (!lv_is_visible(lv))
continue;
log_warn("Removing partial LV %s.", lv->name);
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if (!lv_remove_with_dependencies(cmd, lv, DONT_PROMPT, 0))
return_0;
goto restart;
}
}
_consolidate_vg(cmd, vg);
return 1;
}
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/* Or take pv_name instead? */
static int _vgreduce_single(struct cmd_context *cmd, struct volume_group *vg,
struct physical_volume *pv,
void *handle __attribute__((unused)))
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{
int r;
if (!vg_check_status(vg, EXPORTED_VG | LVM_WRITE | RESIZEABLE_VG))
return ECMD_FAILED;
r = vgreduce_single(cmd, vg, pv, 1);
if (!r)
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return ECMD_FAILED;
return ECMD_PROCESSED;
}
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int vgreduce(struct cmd_context *cmd, int argc, char **argv)
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{
struct volume_group *vg;
const char *vg_name;
int ret = ECMD_FAILED;
int fixed = 1;
int repairing = arg_count(cmd, removemissing_ARG);
int saved_ignore_suspended_devices = ignore_suspended_devices();
int locked = 0;
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if (!argc && !repairing) {
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log_error("Please give volume group name and "
"physical volume paths");
return EINVALID_CMD_LINE;
}
if (!argc) { /* repairing */
log_error("Please give volume group name");
return EINVALID_CMD_LINE;
}
if (arg_count(cmd, mirrorsonly_ARG) && !repairing) {
log_error("--mirrorsonly requires --removemissing");
return EINVALID_CMD_LINE;
}
if (argc == 1 && !arg_count(cmd, all_ARG) && !repairing) {
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log_error("Please enter physical volume paths or option -a");
return EINVALID_CMD_LINE;
}
if (argc > 1 && arg_count(cmd, all_ARG)) {
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log_error("Option -a and physical volume paths mutually "
"exclusive");
return EINVALID_CMD_LINE;
}
if (argc > 1 && repairing) {
log_error("Please only specify the volume group");
return EINVALID_CMD_LINE;
}
vg_name = skip_dev_dir(cmd, argv[0], NULL);
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argv++;
argc--;
if (!repairing)
/* FIXME: Pass private struct through to all these functions */
/* and update in batch afterwards? */
return process_each_pv(cmd, argc, argv, vg_name,
READ_FOR_UPDATE, NULL,
_vgreduce_single);
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log_verbose("Finding volume group \"%s\"", vg_name);
init_ignore_suspended_devices(1);
cmd->handles_missing_pvs = 1;
vg = vg_read_for_update(cmd, vg_name, NULL, READ_ALLOW_EXPORTED);
if (vg_read_error(vg) == FAILED_ALLOCATION ||
vg_read_error(vg) == FAILED_NOTFOUND)
goto_out;
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/* FIXME We want to allow read-only VGs to be changed here? */
if (vg_read_error(vg) &&
(vg_read_error(vg) != FAILED_READ_ONLY) &&
!arg_count(cmd, removemissing_ARG))
goto_out;
locked = !vg_read_error(vg);
if (!vg_read_error(vg) && !vg_missing_pv_count(vg)) {
log_error("Volume group \"%s\" is already consistent", vg_name);
ret = ECMD_PROCESSED;
goto out;
}
release_vg(vg);
log_verbose("Trying to open VG %s for recovery...", vg_name);
vg = vg_read_for_update(cmd, vg_name, NULL,
READ_ALLOW_INCONSISTENT | READ_ALLOW_EXPORTED);
locked |= !vg_read_error(vg);
if (vg_read_error(vg) &&
(vg_read_error(vg) != FAILED_READ_ONLY) &&
(vg_read_error(vg) != FAILED_INCONSISTENT))
goto_out;
if (!archive(vg))
goto_out;
if (arg_count(cmd, force_ARG)) {
if (!_make_vg_consistent(cmd, vg))
goto_out;
} else
fixed = _consolidate_vg(cmd, vg);
if (!vg_write(vg) || !vg_commit(vg)) {
log_error("Failed to write out a consistent VG for %s", vg_name);
goto out;
}
backup(vg);
if (fixed) {
log_print_unless_silent("Wrote out consistent volume group %s", vg_name);
ret = ECMD_PROCESSED;
} else
ret = ECMD_FAILED;
out:
init_ignore_suspended_devices(saved_ignore_suspended_devices);
if (locked)
unlock_vg(cmd, vg_name);
release_vg(vg);
return ret;
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/******* FIXME
log_error ("no empty physical volumes found in volume group \"%s\"", vg_name);
log_verbose("volume group \"%s\" will be reduced by %d physical volume%s",
vg_name, np, np > 1 ? "s" : "");
log_verbose("reducing volume group \"%s\" by physical volume \"%s\"",
vg_name, pv_names[p]);
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log_print("volume group \"%s\" %ssuccessfully reduced by physical volume%s:",
vg_name, error > 0 ? "NOT " : "", p > 1 ? "s" : "");
log_print("%s", pv_this[p]->pv_name);
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********/
}